Hariom Sharma

About Hariom Sharma

I’m a Dubai-based Staff Frontend & Full-Stack Engineer with 10+ years of experience taking products from 0→1 and scaling them across web, mobile, AI tooling, payments, real-time systems, and data-heavy SaaS workflows.At GrowthDay, I built most of the web and mobile platform from scratch and helped scale it to 400K+ users. The work included authentication, billing, subscriptions, live events, courses, coaching, enterprise dashboards, search, reporting, mobile flows, WebRTC/WebSockets, and production AWS infrastructure. I also led 15+ engineers while staying hands-on with architecture, code reviews, production support, and delivery.Before that, I led React/GraphQL platform work at Appointy, a scheduling SaaS used by 1M+ users. I built reusable product modules, complex calendar and booking flows, billing/reporting systems, and products shipped through Appointy for Google and Telefonica.My strongest work sits at the intersection of frontend architecture, product engineering, and practical AI-assisted development. I built dotagent and agent-toolkit to make Claude Code, Codex, and Gemini CLI more reliable across real codebases, with repo rules, specialist agents, skills, checks, and review loops.Best fit: senior/staff frontend, product engineering, or frontend-heavy full-stack roles where the work involves complex workflows, design systems, data-heavy UIs, payments, real-time features, AI tooling, and owning product outcomes end to end.

Experience

1. Technical Lead

   GrowthDay

   Jul 2021 — Apr 2026

   • Built most of GrowthDay’s web and mobile platform from scratch across Next.js, React, TypeScript, Node.js/GraphQL, AWS, and React Native. • Helped scale the product from 10K to 400K+ users across web and mobile. • Led 15+ engineers across frontend, mobile, backend, QA, and DevOps while staying hands-on with architecture, code reviews, delivery, and production support. • Shipped authentication, billing, subscriptions, live events, WebRTC/WebSockets, chat, courses, coaching, enterprise dashboards, search, and reporting. • Improved checkout conversion by 9%, reduced payment/SCA failures by 25%, improved AWS scalability 20x, and reduced infrastructure costs by 25%. • Introduced AI-assisted engineering workflows using Claude Code, reusable skills, MCP/reporting connectors, repo rules, and review loops.

2. Lead Frontend Engineer

   GrowthDay

   Jan 2021 — Jul 2021

   • Led the frontend rebuild of GrowthDay’s core product experience, replacing fragmented app surfaces with reusable React/TypeScript architecture. • Built analytics instrumentation across Mixpanel, RudderStack, Google Analytics, GTM, Meta Pixel, and product dashboards. • Improved reliability and delivery quality through Jest, React Testing Library, Playwright/Cypress, code reviews, and frontend architecture standards.

3. Lead Software Engineer

   Appointy India

   2020 — 2021

   • Led React/GraphQL platform work for Appointy, a scheduling SaaS used by 1M+ users. • Architected Saastack, a modular SaaS framework with reusable product modules, Relay/GraphQL, plugin hooks, i18n, RTL, accessibility, white-label configuration, and multi-repo architecture. • Built complex booking, calendar, staffing, business-hours, billing, reporting, and drag-drop scheduling workflows. • Reduced load times from 15 seconds to under 1 second. • Built and supported scheduling products through Appointy for Google and Telefonica.

4. Engineering Design Lead

   Appointy Software Inc

   2018 — 2020

   • Designed and built multi-layered scheduling workflows across calendars, staff availability, services, business hours, time zones, billing, and reporting. • Led frontend architecture decisions for reusable components, state management, accessibility, and performance. • Evaluated and integrated libraries/tools to shorten delivery cycles while improving code quality.

5. Associate Product Developer

   Appointy Software Inc

   2017 — 2018

   • Created user flows, product roadmaps, and frontend features for multiple scheduling products. • Built Google scheduling products for fitness, restaurant, spa, and massage booking through Appointy. • Built a room conference scheduling system for Telefonica with room/staffing calendars and CMS/TMS integrations.

6. Intern

   Appointy Software Inc

   2015 — 2017

   • Built responsive real-time UI components using WebSockets, Angular, Angular Material, and NGRX. • Automated development tasks for Appointy 9.0, reducing repetitive work and improving delivery speed.

Education

• Maulana Azad National Institute of Technology

  Bachelor of Science · Civil Engineering

  2013 — 2017

Skills

• Large Language Models (LLMs)
• Claude Code Subagents
• HTML5
• Product Road Mapping
• Prompt Engineering
• Git
• Coaching & Mentoring
• Production reliability
• Anthropic Claude
• Scalability
• Generative AI Architecture
• Strategic Planning
• Claude Code configuration
• React.js
• Software Design
• Project Management
• TypeScript
• Cascading Style Sheets (CSS)
• SASS
• Structured output
• Automation
• Context Management
• Change Management
• Multi-Agent Orchestration
• Claude Agent SDK
• Tool & MCP design
• Continuous Integration and Continuous Delivery (CI/CD)
• JavaScript
• AI System Design
• Training & Development
• Progressive Web Apps
• User Experience Design (UED)
• Angular
• HTML